something's fallen off

[Philjw]

Hi Folks,
Does anyone know where I might find a schematic of the electric drivers seat as fitted in my 2005 face lift C5?
Yesterday the seat squab sprang up as I got up and today I found what looks like a short length of speedo drive cable that has fallen out of the adjuster mechanism. Apart from springing up the seat seems to operate as normal.
Is there anything that I should be aware off before attempting to remove the seat? I'm thinking back to the Xantia where the airbag connections are under the seat.